{"id":5913,"date":"2024-11-14T09:56:03","date_gmt":"2024-11-14T01:56:03","guid":{"rendered":"https:\/\/fwq.ai\/blog\/5913\/"},"modified":"2024-11-14T09:56:03","modified_gmt":"2024-11-14T01:56:03","slug":"sql%e6%97%a5%e6%9c%9f%e7%b1%bb%e5%9e%8b%e6%80%8e%e4%b9%88%e6%af%94%e8%be%83","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/5913\/","title":{"rendered":"sql\u65e5\u671f\u7c7b\u578b\u600e\u4e48\u6bd4\u8f83"},"content":{"rendered":"

\n sql \u4e2d\u4f7f\u7528\u6bd4\u8f83\u8fd0\u7b97\u7b26\uff08\u5982 =\u3001>\uff09\u6bd4\u8f83\u4e24\u4e2a\u65e5\u671f\u8868\u8fbe\u5f0f\u4ee5\u786e\u5b9a\u5176\u5173\u7cfb\u3002\u4f8b\u5982\uff0cstartdate <\/p>\n

\"sql\u65e5\u671f\u7c7b\u578b\u600e\u4e48\u6bd4\u8f83\u63d2\u56fe\"<\/p>\n

SQL \u65e5\u671f\u7c7b\u578b\u6bd4\u8f83<\/strong><\/p>\n

\u5728 SQL \u4e2d\uff0c\u65e5\u671f\u7c7b\u578b\u53ef\u4ee5\u8fdb\u884c\u6bd4\u8f83\uff0c\u7528\u4e8e\u786e\u5b9a\u4e24\u4e2a\u65e5\u671f\u4e4b\u95f4\u7684\u5173\u7cfb\u3002\u4ee5\u4e0b\u662f\u5982\u4f55\u5728 SQL \u4e2d\u6bd4\u8f83\u65e5\u671f\u7c7b\u578b\uff1a<\/p>\n

\u65b9\u6cd5\uff1a<\/strong><\/p>\n

\u4f7f\u7528\u6bd4\u8f83\u8fd0\u7b97\u7b26\uff08\u4f8b\u5982 =\u3001>\u3001=\u3001<\/p>\n

\u8bed\u6cd5\uff1a<\/strong><\/p>\n

\u65e5\u671f\u8868\u8fbe\u5f0f1 \u6bd4\u8f83\u8fd0\u7b97\u7b26 \u65e5\u671f\u8868\u8fbe\u5f0f2<\/pre>\n
  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
\u793a\u4f8b\uff1a<\/strong><\/p>\n
startDate < endDate<\/pre>\n
  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
\u6b64\u67e5\u8be2\u6bd4\u8f83 startDate \u548c endDate \u4e4b\u95f4\u7684\u5173\u7cfb\uff0c\u5982\u679c startDate \u65e9\u4e8e endDate\uff0c\u5219\u8fd4\u56de True\uff1b\u5426\u5219\u8fd4\u56de False\u3002<\/p>\n
\u6ce8\u610f\u4e8b\u9879\uff1a<\/strong><\/p>\n
    \n
  •  \u6570\u636e\u7c7b\u578b\uff1a<\/strong>\u6bd4\u8f83\u8fd0\u7b97\u7b26\u53ea\u9002\u7528\u4e8e\u65e5\u671f\u7c7b\u578b\u8868\u8fbe\u5f0f\u3002<\/li>\n
  •  \u65f6\u533a\uff1a<\/strong>\u8bf7\u786e\u4fdd\u6bd4\u8f83\u7684\u65e5\u671f\u8868\u8fbe\u5f0f\u4f7f\u7528\u76f8\u540c\u7684\u65f6\u533a\u3002<\/li>\n
  •  \u7a7a\u503c\u5904\u7406\uff1a<\/strong>\u5982\u679c\u6bd4\u8f83\u7684\u65e5\u671f\u8868\u8fbe\u5f0f\u4e2d\u6709\u4e00\u4e2a\u6216\u4e24\u4e2a\u4e3a NULL\uff0c\u5219\u6bd4\u8f83\u7ed3\u679c\u4e3a NULL\u3002<\/li>\n
  •  \u8303\u56f4\u6bd4\u8f83\uff1a<\/strong>\u53ef\u4ee5\u4f7f\u7528 BETWEEN \u8fd0\u7b97\u7b26\u6bd4\u8f83\u65e5\u671f\u662f\u5426\u5728\u6307\u5b9a\u8303\u56f4\u4e4b\u5185\u3002<\/li>\n<\/ul>\n
    \u5ef6\u4f38\uff1a<\/strong><\/p>\n
    \u9664\u4e86\u6bd4\u8f83\u8fd0\u7b97\u7b26\u4e4b\u5916\uff0cSQL \u8fd8\u63d0\u4f9b\u5176\u4ed6\u7528\u4e8e\u5904\u7406\u65e5\u671f\u7c7b\u578b\u7684\u51fd\u6570\uff1a<\/p>\n
      \n
    •  DATE_ADD()\uff1a<\/strong>\u5c06\u6307\u5b9a\u7684\u65f6\u95f4\u95f4\u9694\u6dfb\u52a0\u5230\u65e5\u671f\u3002<\/li>\n
    •  DATE_SUB()\uff1a<\/strong>\u4ece\u65e5\u671f\u4e2d\u51cf\u53bb\u6307\u5b9a\u7684\u65f6\u95f4\u95f4\u9694\u3002<\/li>\n
    •  DATE_FORMAT()\uff1a<\/strong>\u4ee5\u7279\u5b9a\u683c\u5f0f\u663e\u793a\u65e5\u671f\u3002<\/li>\n<\/ul>\n<\/blockquote>\n
      \u4ee5\u4e0a\u5c31\u662fsql\u65e5\u671f\u7c7b\u578b\u600e\u4e48\u6bd4\u8f83\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u7f51\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
      sql \u4e2d\u4f7f\u7528\u6bd4\u8f83\u8fd0\u7b97\u7b26\uff08\u5982 =\u3001>\uff09\u6bd4\u8f83\u4e24\u4e2a\u65e5\u671f\u8868\u8fbe\u5f0f\u4ee5\u786e\u5b9a\u5176\u5173\u7cfb\u3002\u4f8b\u5982\uff0cstartdate SQL \u65e5\u671f\u7c7b\u578b\u6bd4\u8f83 \u5728 SQL \u4e2d\uff0c\u65e5\u671f\u7c7b\u578b\u53ef\u4ee5\u8fdb\u884c\u6bd4\u8f83\uff0c\u7528\u4e8e\u786e\u5b9a\u4e24\u4e2a\u65e5\u671f\u4e4b\u95f4\u7684\u5173\u7cfb\u3002\u4ee5\u4e0b\u662f\u5982\u4f55\u5728 SQL \u4e2d\u6bd4\u8f83\u65e5\u671f\u7c7b\u578b\uff1a \u65b9\u6cd5\uff1a \u4f7f\u7528\u6bd4\u8f83\u8fd0\u7b97\u7b26\uff08\u4f8b\u5982 =\u3001>\u3001=\u3001 \u8bed\u6cd5\uff1a \u65e5\u671f\u8868\u8fbe\u5f0f1 \u6bd4\u8f83\u8fd0\u7b97\u7b26 \u65e5\u671f\u8868\u8fbe\u5f0f2 \u767b\u5f55\u540e\u590d\u5236 \u793a\u4f8b\uff1a startDate < endDate \u767b\u5f55\u540e\u590d\u5236 \u6b64\u67e5\u8be2\u6bd4\u8f83 startDate \u548c endDate \u4e4b\u95f4\u7684\u5173\u7cfb\uff0c\u5982\u679c startDate \u65e9\u4e8e endDate\uff0c\u5219\u8fd4\u56de True\uff1b\u5426\u5219\u8fd4\u56de False\u3002 \u6ce8\u610f\u4e8b\u9879\uff1a \u6570\u636e\u7c7b\u578b\uff1a\u6bd4\u8f83\u8fd0\u7b97\u7b26\u53ea\u9002\u7528\u4e8e\u65e5\u671f\u7c7b\u578b\u8868\u8fbe\u5f0f\u3002 \u65f6\u533a\uff1a\u8bf7\u786e\u4fdd\u6bd4\u8f83\u7684\u65e5\u671f\u8868\u8fbe\u5f0f\u4f7f\u7528\u76f8\u540c\u7684\u65f6\u533a\u3002 \u7a7a\u503c\u5904\u7406\uff1a\u5982\u679c\u6bd4\u8f83\u7684\u65e5\u671f\u8868\u8fbe\u5f0f\u4e2d\u6709\u4e00\u4e2a\u6216\u4e24\u4e2a\u4e3a NULL\uff0c\u5219\u6bd4\u8f83\u7ed3\u679c\u4e3a NULL\u3002 \u8303\u56f4\u6bd4\u8f83\uff1a\u53ef\u4ee5\u4f7f\u7528 BETWEEN \u8fd0\u7b97\u7b26\u6bd4\u8f83\u65e5\u671f\u662f\u5426\u5728\u6307\u5b9a\u8303\u56f4\u4e4b\u5185\u3002 \u5ef6\u4f38\uff1a \u9664\u4e86\u6bd4\u8f83\u8fd0\u7b97\u7b26\u4e4b\u5916\uff0cSQL \u8fd8\u63d0\u4f9b\u5176\u4ed6\u7528\u4e8e\u5904\u7406\u65e5\u671f\u7c7b\u578b\u7684\u51fd\u6570\uff1a DATE_ADD()\uff1a\u5c06\u6307\u5b9a\u7684\u65f6\u95f4\u95f4\u9694\u6dfb\u52a0\u5230\u65e5\u671f\u3002 DATE_SUB()\uff1a\u4ece\u65e5\u671f\u4e2d\u51cf\u53bb\u6307\u5b9a\u7684\u65f6\u95f4\u95f4\u9694\u3002 DATE_FORMAT()\uff1a\u4ee5\u7279\u5b9a\u683c\u5f0f\u663e\u793a\u65e5\u671f\u3002 \u4ee5\u4e0a\u5c31\u662fsql\u65e5\u671f\u7c7b\u578b\u600e\u4e48\u6bd4\u8f83\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u7f51\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-5913","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/5913","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=5913"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/5913\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=5913"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=5913"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=5913"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}